[mythtv-users] Do I need TV-out with a DVI TV

[Sim]

I understand that you can connect a VGA computer output to the DVI input of a 
TV.  The connection is analogue, but I think TV-out (s-video) is too, so is 
there any difference in quality?  What about composite, that some video cards 
also support?

DVI only seems to be supported on higher-end video cards and I want to build a 
system based on a barebones and just rely on the onboard video..

Sim